4.6 out of 5 Customer Rating
Ortho® Home Defense® Insect Killer for Cracks & Crevices is rated 5.0 out of 5 by 23.
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Ortho

Home Defense Insect Killer for Cracks & Crevices

null
4.6 out of 5 Customer Rating
Ortho® Home Defense® Insect Killer for Cracks & Crevices is rated 5.0 out of 5 by 23.
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Ortho
Home Defense Insect Killer for Cracks & Crevices
null

Roaches and ants don't hang out in the open; they hide in the gaps behind baseboards, under sinks and around door frames. This foaming insect killer spreads deep into those hard-to-reach cracks and crevices to kill listed pests where they live. Ortho has helped homeowners take on pests for over 100 years, so you can treat the hiding spots and get back to enjoying your home.

0205408

Key Features

  • LONG-LASTING CONTROL: Keeps killing American and German cockroaches and Argentine ants for up to 18 months and carpenter ants for up to 30 days on non-porous surfaces
  • FOAMGUARD FORMULA: Foam spreads deep into hard-to-reach cracks and crevices where ants, roaches and other listed home-invading pests crawl and hide, indoors and out
  • TREAT THE HIDING SPOTS: Apply behind baseboards, under sinks and refrigerators, around doors and windows, and along ant trails in kitchens, basements and garages



Ortho Home Defense Insect Killer for Cracks & Crevices uses FoamGuard foam that spreads deep into hard-to-reach places to kill cockroaches, ants, boxelder bugs, centipedes, crickets, fleas, silverfish, ticks and other listed pests. It keeps killing American and German cockroaches and Argentine ants for up to 18 months, and carpenter ants for up to 30 days, on non-porous surfaces. Use it as a spot and crack-and-crevice treatment in and around your home, from kitchens, bathrooms and basements to garages, patios and pet sleeping areas.

Active Ingredient: Deltamethrin Applicator Type: Aerosol foam Product Size: 16 oz. SKU #: 0205408 Product Label: https://smg.widencollective.com/assets/share/asset/suktmrzlma This is not the product label. Always read and follow the product label before use. Safety data sheet can be found at: https://www.scottsmsds.com

Where to Use:

  • Indoors: around residences, including apartments, attics, basements, bathrooms, kitchens, living rooms, play rooms, pet sleeping areas, clothes storage, storage and utility rooms. Apply as a spot and crack-and-crevice treatment in hidden areas around sinks and storage areas, behind baseboards, around doors and windows, behind and under refrigerators, cabinets, sinks and stoves, and under shelves, drawers and bookcases.
  • Outdoors: carports, decks, driveways, garages, gazebos, patios, porches and verandas, and building foundations up to 3 feet high. Applications to impervious surfaces such as sidewalks, driveways, patios, porches and structural surfaces (such as windows, doors and eaves) are limited to spot and crack-and-crevice applications only, other than building foundations. Where Not to Use:
  • Do not use in commercial food/feed handling establishments, restaurants or other places where food/feed is commercially prepared, processed or stored.
  • Do not spray animals directly with product.
  • Do not spray up into air. Direct spray away from face.
  • Do not use on edible crops.
  • Do not apply directly to water, into sewer drains, or to any area like a gutter where drainage to sewers, storm drains, water bodies or aquatic habitat can occur. Do not allow the product to enter any drain during or after application.
  • Do not apply in or on electrical equipment due to the possibility of shock hazard.
  • Do not apply or allow drift to blooming crops or weeds if bees or other pollinating insects are foraging in the treatment area. When to Use: Apply when you see pests or where they crawl and hide. Check treated areas in 4 weeks and re-treat if insect activity continues. How Often to Apply: Repeat as necessary, but not more than once per week. More frequent applications may be necessary on concrete surfaces.


  1. Shake: Shake well before each use, and hold the can upright at all times while spraying.
  2. Prep: Cover all food-handling surfaces and cover or remove all food and cooking utensils, or wash them thoroughly after treatment.
  3. Spray: Hold the can 12–18 inches from the surface and spray directly into cracks and crevices where pests crawl and hide. Direct spray away from your face.
  4. Check back: Check treated areas in 4 weeks and re-treat if activity continues, but not more than once per week.

For Ant Control: Spray ant trails and around doors, windows and other places where ants enter. For carpenter ants, locate and treat nests and surrounding areas, and spray into infested wood through existing openings. For Flea and Tick Control: Remove pet bedding and destroy or clean it thoroughly, then spray pet resting quarters. Put fresh bedding down once the spray has dried. Do not spray animals directly; treat pets with a flea and/or tick control product registered for use on pets before they return to the treated area.


  • The formula is non-staining on surfaces where water alone doesn't stain, but test delicate fabrics or high-value items in an inconspicuous area first.
  • Focus on hidden areas around sinks, behind baseboards and appliances, and under shelves and drawers, where roaches and ants crawl.
  • Treat entry points outside. Spray the foundation up to 2–3 feet high where ants, crickets, sowbugs and clover mites gather and enter.
  • When applying outdoors, do not water the treated area to the point of runoff. Do not make applications during rain.
  • Protect product from freezing. If it freezes, let the product thaw and shake well before use.
  • Keep out of reach of children.
  • Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco or using the toilet.
  • Do not spray animals directly with product.
  • Highly toxic to bees and other pollinating insects exposed to direct treatment or residues on blooming crops or weeds.
  • Contents under pressure. Keep away from heat, sparks and open flame. Do not puncture or incinerate. Exposure to temperatures above 130°F may cause bursting.
  • Store in a cool, dry area away from children. Protect from freezing.
  • If empty, place in trash or offer for recycling if available. If partly filled, call your local solid waste agency for disposal instructions.

Frequently Asked Questions

Can I use Ortho Home Defense Insect Killer for Cracks & Crevices in a home with kids and pets?

Yes, when you follow the label. Keep the can out of reach of children, and do not spray animals directly with the product. For fleas and ticks, remove and clean or destroy pet bedding, spray pet resting quarters, and put fresh bedding down once the spray has dried. Treat pets with a veterinarian-approved flea and/or tick product registered for pets before they return to the treated area.

Ortho Home Defense Insect Killer for Cracks & Crevices keeps killing American and German cockroaches and Argentine ants for up to 18 months, and carpenter ants for up to 30 days, on non-porous surfaces. Check treated areas in 4 weeks and re-treat if activity continues. Do not apply more than once per week.

The FoamGuard formula in Ortho Home Defense Insect Killer for Cracks & Crevices is a foam that spreads deep into hard-to-reach places, so it gets into the cracks and crevices where ants, roaches and other listed pests crawl and hide.

Ortho Home Defense Insect Killer for Cracks & Crevices is non-staining on surfaces where water alone does not stain. Before treating delicate fabrics or high-value items, test an inconspicuous area and let it dry.

Ortho Home Defense Insect Killer for Cracks & Crevices kills American and German cockroaches (including adult and immature stages of organophosphate and carbamate resistant strains), ants including Argentine, carpenter, fire, harvester and pharaoh ants, boxelder bugs, centipedes, crickets, dermestids, firebrats, fleas, palmetto bugs, silverfish, sowbugs, ticks and waterbugs. See the label for the full list.

Yes. Outdoors, spray the building foundation up to 2–3 feet high where insects are active, and spot treat outside surfaces where they gather. Applications to sidewalks, driveways, patios, porches and structural surfaces are limited to spot and crack-and-crevice treatments, other than foundations. Don't apply during rain or to water.

Shake well before each use and hold the can upright at all times while spraying, or it can lose propellant. Flip up the attached applicator tube until it clicks into place. Hold it 12–18 inches from the surface, aim away from your face and spray directly into cracks and crevices.

Rated 5 out of 5 by from Like Magic! I purchased the ready to use hand pump bottle for tight areas which is a stream only but no spray. My research came upon the crack and crevice foam with stick attached already as in a WD40. I ordered it online through Ace Hrdware and picked it up. There was no problem using it. I used the ready to use spray/stream first then used the foam crack/crevice second. If you use the foam crack/crevice please use an abundance of caution which for me was: wear eye protection, disposable gloves, face coverings and wear clothes you would wear to work outside or around the house then wash them afterward. The foam crack/crevice is in my view serious stuff and should be used with caution. The ready to use tight area stream-only pump bottle is much more safe to use in that it won't splatter like the foam does. I baited the little brown "odorous"ants for 8 weeks and got to a point where I couldn't stand it anymore and used primarily the foam crack/crevice where they were coming in. I layed it on heavy and have only seen 12 dead ants in a week and no live ones. This is the real deal ..the foam crack and crevice can in conjunction with the ready to use spray. The foam crack and crevice is the "work horse for sure!
Date published: 2020-05-26
Rated 5 out of 5 by from Ortho home defense foam I bought this last year when I had an influx of roaches from the neighbor's house. I spent a small fortune on roach spray before I found this in Walmart. I sprayed around every thing that looked like it would hide a bug. I ran out and found 5 cans at Walmart on clearance. I bought all they had and gave part of them to the neighbors they were coming from. Within a week of spraying with the Ortho Home Defense no more bugs coming in. Now I had to clean everything that a roach might set up housekeeping. Then I have had almost a year with no bugs seen. Now I'm beginning to see some very small one's in the bathroom. I want more to spray in there.
Date published: 2020-05-19
Rated 5 out of 5 by from No bugs or insects Worked great no sign of bugs anywhere. Easy to use great product. It seems to last along time. My neighbor saw me using it & wanted to try it. He told me the same thing no more problems with insects & bugs. He is going to start using.
Date published: 2019-03-15
Rated 5 out of 5 by from Great Product This product is awesome. Its sprays in cracks and hard places. Kills bugs on contact and the spray works for weeks after being sprayed.
Date published: 2018-10-16
Rated 5 out of 5 by from Long lasting results Home Defense Insect Killer for Cracks and Crevices has been the best product so far for the problematic broken concrete on my carport with the insect invasion. The foam let’s you know when there’s enough in the crack, and once done you can forget that area and it’s bugs. It’s been over 6 months and I haven’t seen a single one, no ants, spiders, cockroaches not even pillbugs!
Date published: 2018-09-27
Rated 5 out of 5 by from Love the foam! The best thing about this product is that the foam expands into the voids. That way, all internal surfaces get contacted by insecticide, not just ones that a spray might hit. Once the foam dissipated, I saw no stains or unsightly residue. One suggested improvement was regarding the straw. It did not lock in the extended position very well, and tended to try to fold down while running the straw along baseboard cracks. You ended up needing two hands - one to hold the can and one on the straw to keep it properly extended. Much easier to crawl along the floor if you have one free hand.
Date published: 2018-05-22
Rated 5 out of 5 by from Loved this product Easy to use, loved the straw to insert into ant hills, etc. seems to kill off the colony.
Date published: 2018-05-07
Rated 5 out of 5 by from easy to use Perfect for those hard to reach cracks and crevices
Date published: 2018-04-29
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